*{
    margin: 0 auto;
    padding: 0;
    font-family: 'Microsoft YaHei', serif;
}
/*body {*/
/*    background-image: url("../images/info_issue_back.png");*/
/*    background-size: cover;*/
/*}*/
.container {
    margin-top: 16%;
}
.grid-demo .bt-style {
    width: 65%;
    height: 300px;
    /*padding: 8px;*/
    margin-left: 18%;
    background-image: url("../images/info_issue_back.png");
    color: #fff;
    -moz-border-radius: 10px;
    -webkit-border-radius: 10px;
    border-radius: 10px; /* future proofing */
    -khtml-border-radius: 10px; /* for old Konqueror browsers */
    text-align: center;
    vertical-align: middle;
    border: 1px solid transparent;
    font-weight: 900;
    font-size:125%;
    position: relative;
    text-decoration: none;
    /*background-color: rgba(219, 87, 51, 1);*/
    display: block;
    text-align: center;
    -webkit-transition: all .1s ease;
    -moz-transition: all .1s ease;
    transition: all .1s ease;
}
/*点击事件*/
.grid-demo .bt-style:active {
    box-shadow: 0px 3px 0px rgba(219, 31, 5, 1), 0px 3px 6px rgba(0, 0, 0, .9);
    position: relative;
    top: 6px;
}
/*鼠标悬停*/
.grid-demo .bt-style:hover {
    /*-webkit-transform:rotate(360deg);*/
    filter:alpha(Opacity=80);
    -moz-opacity:0.7;
    opacity: 0.7
}